XML 32 R20.htm IDEA: XBRL DOCUMENT
v3.10.0.1

PENSION AND OTHER POSTRETIREMENT BENEFITS | 9 Months Ended
--- | ---
Sep. 30, 2018
Retirement Benefits [Abstract] |
PENSION AND OTHER POSTRETIREMENT BENEFITS | PENSION AND OTHER POSTRETIREMENT BENEFITS
| Three months ended September 30, |  | Nine months ended September 30,
| 2018 |  | 2017 |  |  | 2018 |  | 2017 |
(millions of Canadian dollars) |  |  |  |  |
Service cost | 46 |  | 65 |  |  | 162 |  | 181 |
Interest cost | 39 |  | 46 |  |  | 126 |  | 125 |
Expected return on plan assets | (72 | ) | (71 | ) |  | (234 | ) | (195 | )
Amortization of actuarial loss | 6 |  | 11 |  |  | 21 |  | 28 |
Plan curtailments | — |  | — |  |  | 2 |  | — |
Amortization of prior service costs | — |  | (1 | ) |  | (1 | ) | (1 | )
Net periodic benefit costs | 19 |  | 50 |  |  | 76 |  | 138 |

X
- References No definition available. + Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 + Details
Name: | us-gaap_PensionAndOtherPostretirementBenefitsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration